Patient interaction will consist on in person interviews at designated follow-up times and/or telephone interviews. Data will be collected at point of contact, whether that is in person at the clinic site or over the telephone. Telephone interviews will be completed in LATTE study offices. Topics of focus for data collection consists of: whether or not there is a suspected recurrence, new breast primary tumour, new other primary tumour, ischaemic cardiac event, cerebrovascular event, or a serious fracture. Since the follow-up questions are short in detail, respondent burden time should be less than 1 hour in most cases.